5D Mk III Light Leak Issue (through top LCD)...Moderators: gstark, Moderators
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5D Mk III Light Leak Issue (through top LCD)...Apparently there is a light leak issue which has surfaced on the new 5DMk3
http://fstoppers.com/news-5dmk3-light-l ... e-surfaces Multiple people are reporting that there is a light leak through the top LCD panel that directly affects metering. The easiest way to detect this issue is to put the body cap on the camera body as well as cover the viewfinder. Then place the camera in “P” mode at ISO800 and press the LCD backlight button. Shutter speed changes by about a stop when the LCD is on vs off. Some users reporting sunlight or walking into a room with direct overhead light shining on the top panel also affects metering. D600, D7000, Nikon/Sigma/Tamron Lenses, Nikon Flashes, Sirui/Manfrotto/Benro Sticks
Rodney - My Photo Blog Want: Fast Wide (14|20|24)
Re: 5D Mk III Light Leak Issue (through top LCD)...Leaking out????....................or in???????
![]() Regards
Matt. K
Re: 5D Mk III Light Leak Issue (through top LCD)...Leaking out, obviously.
It's why we used to have darkrooms - to keep the dark in. g.
Gary Stark Nikon, Canon, Bronica .... stuff The people who want English to be the official language of the United States are uncomfortable with their leaders being fluent in it - US Pres. Bartlet
Re: 5D Mk III Light Leak Issue (through top LCD)...i think it is leaking "in" for this case. ie: more light is affecting the meter from the top of the lcd as opposed to TTL metering. look at the exposure time, it drops from 10" to 5" when the lcd is activated indicating that more light is reaching the meter.
EM1 l 7.5 l 12-40 l 14 l 17 l 25 l 45 l 60 l 75 l AW1 l V3
Re: 5D Mk III Light Leak Issue (through top LCD)...
It seems to be a leak from within the camera to the sensor. It would be hard to prove that these is no leak 'out' because the problem occurs when the LCD illumination is used WHILE taking the picture. Leaking out would describe the incontinence (either urinary or faecal) that the Canon exec may be experiencing when they realise they may need to recall at least one batch.
Re: 5D Mk III Light Leak Issue (through top LCD)...From what I've read about people testing this it seems this issue is a non issue. Just internet hysteria. Quite a few people reported old models did the same thing.
Who shoots with the lens cap on anyway? ![]()
Re: 5D Mk III Light Leak Issue (through top LCD)...
Damn. Here I was worrying like hell. Oh well... I am sure we will find something wrong with something or rather. ![]()
Re: 5D Mk III Light Leak Issue (through top LCD)...Don't worry Suren. You're still the most anti-Canon Canon shooter I know.
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Re: 5D Mk III Light Leak Issue (through top LCD)...
I think when people compared to old models they were showing the affect of light coming in the viewfinder affecting exposure through the mirror box (which can and does happen with any SLR camera). The test with the Mk3 in this instance is with both the lens cap on and viewfinder covered just to show it's not either of those sources affecting exposure. D600, D7000, Nikon/Sigma/Tamron Lenses, Nikon Flashes, Sirui/Manfrotto/Benro Sticks
Rodney - My Photo Blog Want: Fast Wide (14|20|24)
Re: 5D Mk III Light Leak Issue (through top LCD)...Is this a real issue, or is it another attack of the measurebators?
Does the camera underexpose in normal circumstances?
Re: 5D Mk III Light Leak Issue (through top LCD)...
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I just watched the Digitalrev review. Kai didn't seem to complain about it; so it must be ok.
5D Mk III Light Leak Issue (through top LCD)...
It would appear to be a mixture of both. Based on reports, its not appearing in all circumstances, its only in quite dark conditions and if you have a light source shining above your LCD panel. It's not something thats particularly common but it can occur and having light leaking into your camera and affecting your metering is not cool...especially when you just forked out $4k. EM1 l 7.5 l 12-40 l 14 l 17 l 25 l 45 l 60 l 75 l AW1 l V3
Re: 5D Mk III Light Leak Issue (through top LCD)...Fair enough. I agree a $4k camera shouldn't have basic flaws like this, but I'm also having trouble remembering ever taking photos under those circumstances...
Not getting one anyway ![]()
Re: 5D Mk III Light Leak Issue (through top LCD)...Based on the scientific method, these guys tested one camera and concluded it's ok.
http://www.canonrumors.com/2012/04/the-light-leak-update/
Re: 5D Mk III Light Leak Issue (through top LCD)...I suppose I should add some rationality to this discussion. (Yes, I know ... )
First of all ...
It seems that most of you might not have noticed the little smiley face in Matt's post? He was joking ...
As was I. ![]() Now, to get to the issue at hand: this is basically an extension of the situation whereby you are shooting in a darker environment, camera mounted on a tripod, set for a long time exposure, TTL metering .... and you are not using an eyepiece blind. Theoretically - and depending upon the camera and the metering systems it uses - light may leak in through the eyepiece, and affect the meter reading taken by the camera's metering system. Typically, this would lead to a mild case of overexposure, as more light would be registering at the meter than what is coming through the lens. This problem doesn't occur through normal use of the camera, as usually one of our eyes covers the viewfinder eyepiece; the job of the eyepiece blind is to replace our eye in this instance. In the case of the 5D3, the demonstration would appear to show a valid potential problem, as, save for a problem with the voltage regulation system causing an issue, turning on the LCD's backlight should not be causing any change in the exposure being registered, and especially so with the viewfinder and lens mount both securely blacked out. So, if there is light leaking in to the camera body and affecting the meter's reading, then yes, there is possibly a problem. OTOH, if there is a voltage regulation problem that occurs when the LCD backlight is activated, then again we we have a possible issue. The demonstrations though also show that the problem occurs in sunlight; this kind of eliminates the possibility of a voltage regulation issue and points the finger back at light sealing between the LCD's mount and the exposure metering sensor. And the general discussions seem to indicate that the issue occurs across a number of instances of the camera: any one instance may or may not demonstrate the issue, but across a broad sampling, if there's a large number displaying the problem, then perhas there may be something that Canon need to attend to. g.
Gary Stark Nikon, Canon, Bronica .... stuff The people who want English to be the official language of the United States are uncomfortable with their leaders being fluent in it - US Pres. Bartlet
Re: 5D Mk III Light Leak Issue (through top LCD)...
I don't know I reckon I could craft a few not half unreasonable situations... You're shooting a scene where you're out in open sunlight but your subject is in the shade (you've either cropped in tight using a longer focal length on the shaded subject or you're using spot metering - e.g. shooting a subject in or through a doorway or under a tree, etc). The sunlight on the top LCD +1's your exposure and the camera underexposes your subject. You're indoors in lower ambient light shooting a subject but you are standing under a light (e.g. downlight) - ditto as above. NB: The exposure incorrectness thing you could probably learn to deal with - if however the light actually leaks into and onto part of the sensor during the shot this could be another thing. e.g. I'm using a big stopper to turn day to night for a long exposure or I'm taking stacked star trail images and I turn on the top LCD light (or shine a torch onto the top of the camera) to check how I'm going and it foobars that frame D600, D7000, Nikon/Sigma/Tamron Lenses, Nikon Flashes, Sirui/Manfrotto/Benro Sticks
Rodney - My Photo Blog Want: Fast Wide (14|20|24)
Re: 5D Mk III Light Leak Issue (through top LCD)...I just tested my 7D (yes, I'm aware this is all about the 5D MkIII) for sh*ts and giggles...
Inside my study with the lens cap ON viewfinder facing the window: - Viewfinder uncovered: 1/2 sec @ f/3.5 ISO3200. - Viewfinder covered: 4 sec @ f/3.5 ISO3200. - Viewfinder covered with LCD light on: 4 sec @ f/3.5 ISO3200. Inside my study with the lens cap OFF viewfinder facing the window: - Viewfinder uncovered: 1/200th sec @ f/3.5 ISO3200. - Viewfinder covered: 1/200th sec @ f/3.5 ISO3200. - Viewfinder covered with LCD light on: 1/200th sec @ f/3.5 ISO3200.
Re: 5D Mk III Light Leak Issue (through top LCD)...
Hang on, you sure about that Gary? Wouldn't the extra light hitting the meter cause the camera to reduce the exposure and therefore under expose the real scene?
Re: 5D Mk III Light Leak Issue (through top LCD)...
the VF light leaking is common to almost all slr's; as gary already alluded to, your eye/ face typically covers the VF when shooting so its a non issue. not to mention that it is manufactured as a big window so light is bound to affect things getting inside there, thats not a design or manufacturing flaw. that's not the matter for which people are getting overly excited. although i have my doubts as to the severity of the problem, i doubt there is a fundamental design flaw at all here; however, if there is indeed light leaking into the camera from the lcd panel, this is not a good thing at all.it certainly gives me reason for pause about buying one and i'm not too far off making that decision. EM1 l 7.5 l 12-40 l 14 l 17 l 25 l 45 l 60 l 75 l AW1 l V3
Re: 5D Mk III Light Leak Issue (through top LCD)...I to one should seriously consider buying a backup body for tricky lighting. Perhaps a 7D. Just use two bodies. Easy.
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Re: 5D Mk III Light Leak Issue (through top LCD)...
Interesting results....wonder why the variance between the lenscap on situation regarding the viewdinder. Cameron
Nikon F/Nikon 1 | Hasselblad V/XPAN| Leica M/LTM |Sony α/FE/E/Maxxum/M42 Wishlist Nikkor 24/85 f/1.4| Fuji Natura Black Scout-Images | Flickr | 365Project
Re: 5D Mk III Light Leak Issue (through top LCD)...Perhaps it's because the sensor becomes more sensitive during less light so more likely pick up smaller changes in light.
Re: 5D Mk III Light Leak Issue (through top LCD)...Ok, I am late to the joke party on this, but, it was worth the wait.....this is all Julian Assange's fault. Oh yeah, I went there.
![]() Regards, Patrick
Two or three lights, any lens on a light-tight box are sufficient for the realisation of the most convincing image. Man Ray 1935. Our mug is smug
Re: 5D Mk III Light Leak Issue (through top LCD)...
![]() Cameron
Nikon F/Nikon 1 | Hasselblad V/XPAN| Leica M/LTM |Sony α/FE/E/Maxxum/M42 Wishlist Nikkor 24/85 f/1.4| Fuji Natura Black Scout-Images | Flickr | 365Project
5D Mk III Light Leak Issue (through top LCD)...Looks like Canon has acknowledged they're looking at this. There's a press release posted on Canon Rumors from Canon US.
Re: 5D Mk III Light Leak Issue (through top LCD)...
5D Mk III Light Leak Issue (through top LCD)...How could they screw that up ? I mean come on.
EM1 l 7.5 l 12-40 l 14 l 17 l 25 l 45 l 60 l 75 l AW1 l V3
Re: 5D Mk III Light Leak Issue (through top LCD)..., We can ask but it probably has something to do with bean counters and rushing product to market. Stuff like this happens all the time.....D5000 repair then re-Repair because they found a better fix, mirror faking off the 5cm..Leica X1 with all the rubber falling off... Cameron
Nikon F/Nikon 1 | Hasselblad V/XPAN| Leica M/LTM |Sony α/FE/E/Maxxum/M42 Wishlist Nikkor 24/85 f/1.4| Fuji Natura Black Scout-Images | Flickr | 365Project
Re: 5D Mk III Light Leak Issue (through top LCD)...I've got a 5D mk III that is exhibiting this issue. However as far as I know it has not affected my exposures and I've used it already on weddings (excellent test) and portrait work. I've taken it around on touristy shots and I haven't really encountered any 'weird' exposure issues that I've already experienced with my 5D mk II.
I shoot mostly Manual and switch to AV and use EC and no have no problems. Hope this helps
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